docs: def get_post_data(self, request):
          """
          Collect and merge post parameters with multipart files.
          """
          params = dict(request.POST)
          params.update(request.FILES)
  
          data = defaultdict(dict)
  
          # Split data and meta parameters
          for param in sorted(params.keys()):
              value = params[param]
  
              if isinstance(value, list) and len(value) <= 1:
                  value = value[0] if value else None
  
              prefix, _, field = param.partition('[')
              if field:
                  field = field[:-1]
                  try:
                      data[prefix][field] = value
                  except TypeError:
                      raise InvalidNodeData('Got both reserved parameter "data" and plugin specific parameters.')
              else:
                  data[prefix] = value
  
          return data['data'], data['meta']